US20080289902A1 - Protective Shield for Thermal and Acoustic Shielding of Components of an Internal Combustion Engine - Google Patents

Protective Shield for Thermal and Acoustic Shielding of Components of an Internal Combustion Engine Download PDF

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Publication number
US20080289902A1
US20080289902A1 US12/096,396 US9639606A US2008289902A1 US 20080289902 A1 US20080289902 A1 US 20080289902A1 US 9639606 A US9639606 A US 9639606A US 2008289902 A1 US2008289902 A1 US 2008289902A1
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US
United States
Prior art keywords
protective shield
metal net
shield according
carrier plate
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/096,396
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English (en)
Inventor
Ralf Krus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
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Individual
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Assigned to FEDERAL-MOGUL SEALING SYSTEMS reassignment FEDERAL-MOGUL SEALING SYSTEMS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KRUS, RALF
Publication of US20080289902A1 publication Critical patent/US20080289902A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0876—Insulating elements, e.g. for sound insulation for mounting around heat sources, e.g. exhaust pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0884—Insulating elements, e.g. for sound insulation for mounting around noise sources, e.g. air blowers

Definitions

  • the present invention relates to a multi-layer protective shield which serves for the thermal and acoustic shielding of components of an internal combustion engine and of turbochargers, catalytic converters, exhaust manifolds and the like.
  • Shields of this type are used on motor vehicles but also comparable machines for heat and sound shielding of components.
  • Such components are mainly constituent parts of the exhaust system, i.e. catalytic converters, exhaust manifolds, turbochargers and the like.
  • the shields are to shield the interior space of the vehicle against the high temperatures and the sound that develops through vibrations that occur.
  • the shields are to preferably absorb, i.e. not simply reflect noises.
  • thermal shielding is indispensable in order to prevent that other vehicle components are detrimentally affected by the high temperatures.
  • an application can also consist in conversely thermally shielding the section of the exhaust system from the engine as far as to the catalytic converter. Since such exhaust catalytic converters require a certain minimum temperature for their correct and best possible functioning, faster reaching of the operating temperature can be achieved through such “converse” shielding. As a result, the exhaust values of the respective vehicle can be improved.
  • Corresponding shields can also be used in the engine compartment in order to protect components such as for example plastic hoses, electrical wiring, engine electronics etc. against excessive temperatures.
  • components such as for example plastic hoses, electrical wiring, engine electronics etc.
  • thermal shielding There is a plurality of possibilities for achieving thermal shielding.
  • One of these consists in the use of heat-insulating materials in the shield, for example foam-like materials or fibre materials which, because of their comparatively large content of air, are poor heat conductors.
  • Another or additional possibility is to reflect the heat radiation from hot components on the shield, which for instance can be achieved through metal coatings. Such reflection is most easily achieved through a solid plate.
  • Such air and thus sound-impermeable plates however are disadvantageous with regard to sound insulation, since the sound is substantially reflected completely. In unfavourable cases even resonance can be caused which brings about droning and similar undesirable acoustic effects.
  • Acoustic shielding can be obtained through special sound-absorbing surface structures, but this is generally difficult to establish and/or requires certain minimum thicknesses of the corresponding layers, which is a disadvantage in the partly confined conditions in modern vehicles.
  • Another possibility therefore consists in using a material with permeable pores. Within such pores the mechanical energy of sound waves can be converted into heat through friction, so that acoustic shielding is obtained. Through the air content in the pores, thermal insulation is additionally achieved.
  • a shield which is to comprise both good acoustic as well as thermal shielding characteristics, is therefore generally composed of various materials in accordance with the problems discussed above. In addition, such a shield must still have additional mechanical characteristics.
  • a protective shield for the thermal and acoustic shielding of a component of an internal combustion engine.
  • the protective shield comprises a metal net with a multiplicity of through apertures; at least one absorber layer of a sound-absorbing material; and a carrier plate.
  • the metal net is arranged on the side of the protective shield facing the component, the at least one absorber layer is arranged between the metal net and the carrier plate and the carrier plate in its edge region is folded over the edge of the metal net.
  • an effective acoustic/thermal shield is provided, which is easy to manufacture, has good mechanical stability and can be handled without the risk of injuries to persons or damage to other vehicle parts.
  • the metal net has a depression wherein the at least one absorber layer is arranged within said depression.
  • the distance between the metal net and the carrier plate within the depression amounts to at least approximately 5 mm.
  • the overall area of the through apertures in the metal net amount to between 20 to approximately 30% of the total area of the metal net.
  • the carrier plate is an aluminized steel plate with a thickness of approximately 0.4 mm.
  • the coating can be provided as corrosion protection but also improve the heat reflection of the shield.
  • the sound-absorbing material comprises a fibre material, which can be basalt wool with a specific weight of approximately 950 g/m 3 .
  • the sound-absorbing material comprises a foam rubber material which can be melamine foam.
  • the at least one absorber layer is a multi-layer composite layer.
  • the carrier plate on the side facing the at least one absorber layer comprises a sound-absorbing surface structure.
  • fastening means are provided in the edge region in order to attach the protective shield.
  • the edge region is particularly suited to provide such fastening means therein, because of the good stability and durability in the folded-over region.
  • FIG. 1 shows an embodiment of the present invention in cross section
  • FIG. 2 shows an alternative embodiment of the present invention in cross section.
  • FIG. 1 shows an embodiment of the protective shield according to an invention in a cross-sectional view which is arranged as shield of a component 8 of an internal combustion engine.
  • the component 8 can for example be a turbocharger, a catalytic converter or another component which gets hot in operation, i.e. constitutes a source of heat.
  • the heat output is frequently also connected with sound radiation such as is the case for example with silencers or turbochargers.
  • Porosity is used in the following in connection with the present invention. Porosity according to the invention means the part of the metal net or mesh which is permeable, i.e. the component of the area of such a layer that is assumed by through apertures based on the total area of the respective layer.
  • a permeable metal net 2 such as wire mesh or netting.
  • the metal net 2 thus has through apertures which are thus “porous” or air-permeable.
  • On the side of the metal net 2 facing away from the component 8 is located at least one absorber layer 4 which has a sound-absorbing function.
  • This layer 4 can be a composite layer.
  • the shielding element according to the invention is enclosed by a carrier plate 6 .
  • the carrier plate 6 is folded over about the layer 2 in its edge region 10 (indicated by the dashed circle).
  • the edge region 10 is only folded over about the metal net layer 2 .
  • the metal net 2 forms a depression or pocket in which the absorber layer 4 is located. Forming such a pocket facilitates the manufacturing process of the shielding element according to the invention, since the absorber layer in this case can be inserted easily and thus is already fixed in a preliminary manner. In other words it is easier to arrange the layers on top of one another as an accurate fit when producing the shield than without such a pocket.
  • the invention is not restricted to this embodiment; in other embodiments (not shown) no such pocket is present, in this case the absorber layer 4 and the metal net layer 2 lie on top of each other over their entire area.
  • the carrier plate 6 is then folded over also about the edges of both layers 2 , 4 . Since in this case the absorber layer at its edges is additionally clamped in between carrier plate 6 and metal net layer 4 , slipping of the absorber layer 4 can be effectively prevented with such an embodiment.
  • the protective shield according to the invention possesses a double shielding effect against heat and sound radiation.
  • a type of shielding other than for sound is desired. While with heat radiation it is desirable to reflect such heat radiation to the greatest possible extent, i.e. to discharge it to the environment, exactly the opposite effect is desirable in the case of sound. Sound waves are not to be reflected, which increases the external noises of the vehicle and in unfavourable cases can also result in resonances (“droning”), but instead are to be completely absorbed if possible.
  • the effectiveness of the shield can be adapted to certain frequency ranges. Greater distances shift the frequency absorption curve towards lower frequencies and vice versa. This is advantageous since depending on the component to be shielded a specific frequency range can be covered. For example in the case of turbochargers rather high frequencies (“whistling”) occur because of their high speed while other sections of the exhaust system generate comparatively lower frequencies.
  • this distance can be advantageously determined through the depth of the pocket. Since metal net and carrier plate as a rule will be clearly more compression-resistant than for example the absorber layer consisting of foams, a defined distance for the intended frequency range can be easily maintained in this way whereas without such a pocket the absorber layer would be deformable to a greater extent. Through the deformation, i.e. flattening of the absorber layer the defined distance would be changed or reduced so that frequencies other than the desired ones would be absorbed, while the frequencies actually to be shielded would then be allowed to pass through to an undesirably greater degree.
  • a shape-retaining protective shield is obtained that will not substantially change the distance between carrier plate and metal net even in operation.
  • the folding over or flanging over of the carrier plate makes possible simple and cost-effective manufacture of the multi-layer protective shield.
  • the handling especially during assembly is facilitated since the folded-over region encloses sharp edges of the metal net.
  • fastening means can also be provided in a simple manner (not shown), which make possible secure fastening of the protective shield and which show no tendency to tear out during continuous operation.
  • Such fastening means can for example be bores for screws, rivets or the like which are provided in the edge region.
  • FIG. 2 shows an alternative embodiment of the protective shield of FIG. 1 .
  • a sound-absorbing surface configuration or structure 12 is additionally present on the inner side of the carrier plate 6 .
  • This structure 12 for example can be provided through punching-in or the like in the carrier plate 6 .
  • An additional advantage with a structure as shown here consists in that slipping of the absorber layer 4 is additionally reduced.
  • adaptation of the sound absorption can also be easily obtained in that the metal net is rolled to a desired porosity, i.e. the pore sizes are brought to desired values through rolling or the like.
  • a multi-layer heat protection shield for use in the vehicle engine region is described in the present invention, for the thermal and acoustic shielding of hot components such as turbocharger, exhaust manifold etc.
  • the sound-absorbing effective heat shield comprises at least 3 layers.
  • the layer facing the sound/heat source is a metal net, e.g. a metal wire mesh or netting.
  • a metal net e.g. a metal wire mesh or netting.
  • an absorber material for sound absorption is followed by a metal plate (for example an aluminized steel plate of 0.4 mm thickness), which holds together the layer composition through folding over of the edge region at least about the metal net.
  • the folded-over edge region ensures easier and more secure handling during the assembly of the shield according to the invention.
  • the folding-over also gives the shield greater stiffness and increased durability during continuous engine operation.
  • the metal wire mesh layer can be embodied as regular or irregular netting, i.e. the size and arrangement of the through apertures or “pores” is either regular or irregular.
  • “Porosity” in terms of the present invention must be understood as the total area of the through apertures based on the total area of the mesh layer. Through its porosity (20 to 30%) the netting is able to convert impinging sound waves into heat through friction, thus damping said sound waves.
  • the regular or irregular distances or the size of the pores of the netting can be configured depending on the frequency range of the sound waves to be shielded.
  • An additional possibility of influencing the porosity (adaptation to different frequencies) of the netting can be effected through flat-rolling or compressing to various thicknesses of the netting, as a result of which the porosity can be changed. As a result of this, additional stiffness of the netting can be achieved in addition.
  • the netting layer should additionally ensure the accommodation of the absorber material during the manufacturing process of the shield.
  • a type of depression or pocket for example in the depth of the thickness of the absorber material, is pressed into the netting into which the absorber material can be placed.
  • the depth of the pocket produces a defined distance of the mesh layer to the terminal or carrier plate, which in a preferred embodiment should at least amount to 5 mm.
  • the absorption can be suitably adapted to the requirements through suitable selection of this distance.
  • the absorber material in the multi-layer construction of the shield assumes the task of the residual absorption of the sound waves that pass through the netting.
  • fibre materials for instance basalt wool 960 g/m 3
  • foams for example melamine foam
  • the absorber material can be single or multi-layered. It can also have different densities in the layer composition in order to be able to cover as wide as possible a frequency range.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Exhaust Silencers (AREA)
US12/096,396 2005-12-06 2006-08-11 Protective Shield for Thermal and Acoustic Shielding of Components of an Internal Combustion Engine Abandoned US20080289902A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102005058253A DE102005058253B4 (de) 2005-12-06 2005-12-06 Schutzschild zur thermischen und akustischen Abschirmung von Bauteilen einer Verbrennungskraftmaschine
DE102005058253.2 2005-12-06
PCT/EP2006/007991 WO2007065491A1 (de) 2005-12-06 2006-08-11 Schutzschild zur thermischen und akustischen abschirmung von bauteilen einer verbrennungskraftmaschine

Publications (1)

Publication Number Publication Date
US20080289902A1 true US20080289902A1 (en) 2008-11-27

Family

ID=36992601

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/096,396 Abandoned US20080289902A1 (en) 2005-12-06 2006-08-11 Protective Shield for Thermal and Acoustic Shielding of Components of an Internal Combustion Engine

Country Status (4)

Country Link
US (1) US20080289902A1 (de)
EP (1) EP1957317B1 (de)
DE (2) DE102005058253B4 (de)
WO (1) WO2007065491A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090026008A1 (en) * 2005-03-22 2009-01-29 Federal-Mogul Dealing Systems Gmbh Shielding element for motor vehicles
WO2016034506A1 (en) * 2014-09-01 2016-03-10 Reinz-Dichtungs-Gmbh Heat shield and part shielded with such a heat shield
US20170015191A1 (en) * 2014-03-28 2017-01-19 Yanmar Co., Ltd. Working vehicle
US20170021721A1 (en) * 2014-03-28 2017-01-26 Yanmar Co., Ltd. Working vehicle
CN107355320A (zh) * 2017-08-16 2017-11-17 江门市大长江集团有限公司 一种可拆装阻燃板的摩托车空滤器
US20180141504A1 (en) * 2015-06-02 2018-05-24 Lydall, Inc. Heat shield with sealing member
CN109835274A (zh) * 2019-02-28 2019-06-04 重庆长安汽车股份有限公司 一种机舱隔热罩和汽车
US20190234428A1 (en) * 2018-01-31 2019-08-01 GM Global Technology Operations LLC Turbocharger with a wastegate noise reduction device
US10589698B2 (en) 2015-06-08 2020-03-17 Bayerische Motoren Werke Aktiengesellschaft Heat shield for a heat- and sound-radiating component in a motor vehicle
US20230108070A1 (en) * 2021-10-01 2023-04-06 GM Global Technology Operations LLC Bubble cover to reduce noise and vibration

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Publication number Priority date Publication date Assignee Title
DE102011107119A1 (de) 2011-07-12 2013-01-17 Daimler Ag Abgaskrümmerabdeckung mit einem Hitzeschild und einer Abgaskrümmerdichtung
US9790836B2 (en) 2012-11-20 2017-10-17 Tenneco Automotive Operating Company, Inc. Loose-fill insulation exhaust gas treatment device and methods of manufacturing
DE102017206474A1 (de) * 2017-04-13 2018-10-18 Bayerische Motoren Werke Aktiengesellschaft Kühleinrichtung für ein Kraftfahrzeug, sowie Verfahren zum Kühlen einer Komponente eines Kraftfahrzeugs

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US7445084B2 (en) * 2002-11-18 2008-11-04 Carcoustics Tech Center Gmbh Soundproof thermal shield
US20090026008A1 (en) * 2005-03-22 2009-01-29 Federal-Mogul Dealing Systems Gmbh Shielding element for motor vehicles

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Publication number Priority date Publication date Assignee Title
US2576698A (en) * 1948-04-14 1951-11-27 Johns Manville Metal-sheathed insulating blanket and method of manufacture
US2867035A (en) * 1951-09-25 1959-01-06 Gen Electric Thermal insulation
US3491849A (en) * 1967-12-18 1970-01-27 Tiffany Brown Engine exhaust manifold cover
US4166878A (en) * 1976-10-01 1979-09-04 Caterpillar Tractor Co. Gas turbine engine internal insulation comprising metallic mesh--restrained ceramic fiber layer
US4104783A (en) * 1976-11-12 1978-08-08 Process Engineering, Inc. Method of thermally insulating a cryogenic storage tank
US4183557A (en) * 1978-02-15 1980-01-15 Duro Dyne Corporation Insulative flexible connector
US4442585A (en) * 1982-03-31 1984-04-17 Mcgehee Sr Fred N Method of construction for thermal and acoustic insulation blankets
US5139839A (en) * 1988-04-20 1992-08-18 Applied Insulation Pty Ltd. Thermal insulation blanket
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US6964801B1 (en) * 1997-01-10 2005-11-15 Dana Corporation Method for producing a heat shield and heat shield produced by this method
US5996730A (en) * 1997-05-27 1999-12-07 Hecralmat Heat shield with acoustic insulation
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US20090026008A1 (en) * 2005-03-22 2009-01-29 Federal-Mogul Dealing Systems Gmbh Shielding element for motor vehicles

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7909134B2 (en) * 2005-03-22 2011-03-22 Federal-Mogul Sealing Systems Gmbh Shielding element for motor vehicles
US20090026008A1 (en) * 2005-03-22 2009-01-29 Federal-Mogul Dealing Systems Gmbh Shielding element for motor vehicles
US10549626B2 (en) * 2014-03-28 2020-02-04 Yanmar Co., Ltd. Working vehicle
US20170015191A1 (en) * 2014-03-28 2017-01-19 Yanmar Co., Ltd. Working vehicle
US20170021721A1 (en) * 2014-03-28 2017-01-26 Yanmar Co., Ltd. Working vehicle
US11155156B2 (en) 2014-03-28 2021-10-26 Yanmar Power Technology Co., Ltd. Working vehicle
US9902257B2 (en) * 2014-03-28 2018-02-27 Yanmar Co., Ltd. Working vehicle
WO2016034506A1 (en) * 2014-09-01 2016-03-10 Reinz-Dichtungs-Gmbh Heat shield and part shielded with such a heat shield
US20180141504A1 (en) * 2015-06-02 2018-05-24 Lydall, Inc. Heat shield with sealing member
US10604087B2 (en) * 2015-06-02 2020-03-31 Lydall, Inc. Heat shield with sealing member
US10589698B2 (en) 2015-06-08 2020-03-17 Bayerische Motoren Werke Aktiengesellschaft Heat shield for a heat- and sound-radiating component in a motor vehicle
CN107355320A (zh) * 2017-08-16 2017-11-17 江门市大长江集团有限公司 一种可拆装阻燃板的摩托车空滤器
US10473121B2 (en) * 2018-01-31 2019-11-12 GM Global Technology Operations LLC Turbocharger with a wastegate noise reduction device
US20190234428A1 (en) * 2018-01-31 2019-08-01 GM Global Technology Operations LLC Turbocharger with a wastegate noise reduction device
CN109835274A (zh) * 2019-02-28 2019-06-04 重庆长安汽车股份有限公司 一种机舱隔热罩和汽车
US20230108070A1 (en) * 2021-10-01 2023-04-06 GM Global Technology Operations LLC Bubble cover to reduce noise and vibration

Also Published As

Publication number Publication date
DE102005058253A1 (de) 2007-06-14
DE102005058253B4 (de) 2007-10-04
WO2007065491A1 (de) 2007-06-14
EP1957317B1 (de) 2010-11-03
DE502006008252D1 (de) 2010-12-16
EP1957317A1 (de) 2008-08-20

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Date Code Title Description
AS Assignment

Owner name: FEDERAL-MOGUL SEALING SYSTEMS, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KRUS, RALF;REEL/FRAME:021057/0053

Effective date: 20080430

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION